BDSM The Cow Milker

Our little 19-year old HuCow Vina is the first to try our new Cow Milker!! You have been asking for it! There are a few problems to overcome. A HuCow only has two udders, so we have to block off the other two milking cups, which makes the vacuum (that is already much stronger than on the goat milker) double in power. So we now have a machine that is about 4 times as strong as the goat milker, it can literally suck a girl’s nipples off!! We need to be careful about the settings, we don’t want to damage our poor Vina!
A strange thing happened though… the milking changed Vina somehow. After we stopped the session to let her recover, Vina picked up the milking cups and asked if she could ‘have a little more’ in her sweet tiny voice. She then proceeded to switch the machine back on and milked herself voluntarily!! What is happening here? Check out the video, maybe you can explain this!